//---------------------------------------------------------------------
//    Serial_Send_Analog
//     Demonstrates sending data (numbers) to the serial port
//---------------------------------------------------------------------
/*   Hardware Setup- a voltage divider connected to analog pin A5 :
 *   1) -Wire a photoresister between +5vdc and an empty row on the breadboard
 *   2) -Wire a 10k resistor between that same row on the breadboard to ground.
 *   3) -Jumper wire from that same row to the last pin on the chip (analog 5)
 *   4) -Wire an LED thru a 330 ohm resistor from digital pin 7 to gnd
 *
 *-------------------------------------------------------------------------*/

int analogPin = A5;             // Variable for which analog pin to read
int LEDpin = 7;                 // Variable for which pin for LED
int analogValue;                // Variable for storing analog readings
 
void setup()
{
  Serial.begin(9600);           // start serial port at 9600 bps:
  pinMode(LEDpin, OUTPUT);      // sets pin  as output  
}

void loop()
{
  // read digital input, remap 10-bit value to 8-bit:
  analogValue = analogRead(analogPin); 
  analogValue = map(analogValue, 0, 1023, 0, 255);
  
  if(analogValue > 180) {              // If light level is below  180
  digitalWrite(LEDpin, HIGH);          // Turn on LED
  } else {  
  digitalWrite(LEDpin, LOW);  
  }
  // analogValue = analogValue / 4;   // Scale if necessary
  Serial.write(analogValue);          // Send analogValue to serial (USB)
  delay(40);                          // pause for 40 milliseconds        
}